WSCH-FM said Kappes was an associate minister at Saint Louis Church in Batesville from 2002 until 2005.

Kappes, who is attached to the Archdiocese of Indianapolis, has been attending the University of Athens for about three years, said Greg Otolski, a spokesman for the archdiocese. The Star said Kappes has previously lived in Mexico and Italy and speaks at least six languages.

"We're obviously really concerned about the fact that no one is able to reach him and we're asking people to pray for his safety," Otolski told The Associated Press on Thursday.

He said church officials from Indianapolis contacted the Vatican embassy in Washington and the office of Sen. Richard Lugar. The Vatican embassy had no immediate comment.

"We are hopeful they locate Father Kappes very soon," Stanley told the AP.

Kappes' family said they've been in contact with the U.S. embassy in Athens and Greek police, but don't know what has happened to him.

State Department spokeswoman Victoria Nuland said Kappes visited the embassy in Athens on Monday, but he didn't request safe haven. U.S. officials don't know where he went and haven't spoken to him since, she said.

Charcap told NBC 13 that her brother told her that the embassy wouldn't let him stay there.

Charcap told the Star her brother said the family of the woman who works as his translator appeared to be upset about the woman receiving an inheritance from her grandparents, and were trying to get the money from her.

"In two days he went from being totally stable to really fearing for his life," Charcap told the Star.

Israeli Prime Minister Benjamin Netanyahu warned Tuesday that a proposed agreement between world powers and Iran was "a bad deal" that would not stop Tehran from getting nuclear weapons -- but would rather pave its way to getting lots of them and lea...